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The turbulent origin of spin–orbit misalignment in planetary systems
Ist Teil von
Monthly notices of the Royal Astronomical Society, 2015-07, Vol.450 (3), p.3306-3318
Ort / Verlag
London: Oxford University Press
Erscheinungsjahr
2015
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The turbulent environment from which stars form may lead to misalignment between the stellar spin and the remnant protoplanetary disc. By using hydrodynamic and magnetohydrodynamic simulations, we demonstrate that a wide range of stellar obliquities may be produced as a by-product of forming a star within a turbulent environment. We present a simple semi-analytic model that reveals this connection between the turbulent motions and the orientation of a star and its disc. Our results are consistent with the observed obliquity distribution of hot Jupiters. Migration of misaligned hot Jupiters may, therefore, be due to tidal dissipation in the disc, rather than tidal dissipation of the star–planet interaction.